Allow to build a static version of libosl.

[osl.git] / osl.c

diff --git a/osl.c b/osl.c
index 430d120fb3a286f61e1eb2a8ab3c2912d6652206..67160d2b3bb14539edf1cd5f8b886d55940d0f63 100644 (file)
--- a/osl.c
+++ b/osl.c
@@ -61,20 +61,18 @@ static void __attribute ((constructor)) init_loglevel(void)
 __printf_2_3 void __log(int ll, const char* fmt,...)
 {
        va_list argp;
-       FILE *outfd;
        struct tm *tm;
        time_t t1;
        char str[255] = "";
 
        if (ll < loglevel)
                return;
-       outfd = stderr;
        time(&t1);
        tm = localtime(&t1);
        strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
-       fprintf(outfd, "%s ", str);
+       fprintf(stderr, "%s ", str);
        va_start(argp, fmt);
-       vfprintf(outfd, fmt, argp);
+       vfprintf(stderr, fmt, argp);
        va_end(argp);
 }
 
@@ -341,7 +339,7 @@ err:
 int read_table_desc(struct osl_object *map, struct osl_table_description *desc)
 {
        char *buf = map->data;
-       uint8_t version;
+       uint8_t version, compat_version, create_version;
        uint16_t header_size;
        int ret, i;
        unsigned offset;
@@ -352,7 +350,19 @@ int read_table_desc(struct osl_object *map, struct osl_table_description *desc)
        if (strncmp(buf + IDX_OSL_MAGIC, OSL_MAGIC, strlen(OSL_MAGIC)))
                return -E_OSL_NO_MAGIC;
        version = read_u8(buf + IDX_VERSION);
-       if (version < MIN_TABLE_VERSION || version > MAX_TABLE_VERSION)
+       /*
+        * The on-disk version consists of two version numbers: the
+        * create_version (low 4 bits) is the CURRENT_TABLE_VERSION version
+        * number of the library that created the table, and compat_version
+        * (high 4 bits) tells us the lowest version of the library that can
+        * still read this table.
+        */
+       create_version = version & 0xf;
+       compat_version = version >> 4;
+       INFO_LOG("create_version: %u, compat_version: %u\n", create_version,
+               compat_version);
+       if (create_version < MIN_TABLE_VERSION /* table too old */
+               || compat_version > CURRENT_TABLE_VERSION) /* libosl too old */
                return -E_OSL_VERSION_MISMATCH;
        desc->flags = read_u8(buf + IDX_TABLE_FLAGS);
        desc->num_columns = read_u16(buf + IDX_NUM_COLUMNS);
@@ -487,7 +497,8 @@ static int create_table_index(struct osl_table *t)
        sprintf(buf + IDX_OSL_MAGIC, "%s", OSL_MAGIC);
        write_u8(buf + IDX_TABLE_FLAGS, t->desc->flags);
        write_u8(buf + IDX_DIRTY_FLAG, 0);
-       write_u8(buf + IDX_VERSION, CURRENT_TABLE_VERSION);
+       write_u8(buf + IDX_VERSION, CURRENT_TABLE_VERSION
+               + (COMPAT_TABLE_VERSION << 4));
        write_u16(buf + IDX_NUM_COLUMNS, t->num_mapped_columns + t->num_disk_storage_columns);
        write_u16(buf + IDX_HEADER_SIZE, t->index_header_size);
        offset = IDX_COLUMN_DESCRIPTIONS;
@@ -1034,6 +1045,7 @@ int init_rbtrees(struct osl_table *t)
        /* add valid rows to rbtrees */
        t->num_invalid_rows = 0;
        for (i = 0; i < t->num_rows; i++) {
+               struct osl_object *volatile_objs;
                ret = row_is_invalid(t, i);
                if (ret < 0)
                        return ret;
@@ -1041,7 +1053,14 @@ int init_rbtrees(struct osl_table *t)
                        t->num_invalid_rows++;
                        continue;
                }
-               ret = add_row_to_rbtrees(t, i, NULL, NULL);
+               if (t->num_volatile_columns > 0) {
+                       volatile_objs = calloc(t->num_volatile_columns,
+                               sizeof(struct osl_object));
+                       if (!volatile_objs)
+                               return -E_OSL_NOMEM;
+               } else
+                       volatile_objs = NULL;
+               ret = add_row_to_rbtrees(t, i, volatile_objs, NULL);
                if (ret < 0)
                        return ret;
        }